<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Reader
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Category.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Feed_Reader_Collection_CollectionAbstract
 */
require_once 'Zend/Feed/Reader/Collection/CollectionAbstract.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Reader
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Reader_Collection_Category extends Zend_Feed_Reader_Collection_CollectionAbstract {
	
	/**
	 * Return a simple array of the most relevant slice of
	 * the collection values. For example, feed categories contain
	 * the category name, domain/URI, and other data. This method would
	 * merely return the most useful data - i.e. the category names.
	 *
	 * @return array
	 */
	public function getValues() {
		$categories = array ();
		foreach ( $this->getIterator () as $element ) {
			if (isset ( $element ['label'] ) && ! empty ( $element ['label'] )) {
				$categories [] = $element ['label'];
			} else {
				$categories [] = $element ['term'];
			}
		}
		return array_unique ( $categories );
	}

}
